I used to be driven to get deep into every aspect of the game.
But then pretty much everybody I played with offline and online stopped playing, and all the effort I put into the game felt like a huge waste of time. It's kind of a vicious cycle.
So I can't really blame people who don't put that much time into the game. If anything it seems like the smarter thing to do. :P Why would you waste your time on a dead end when you could be doing better things. At least they get what they want out of the game, then go on to do other things with the extra time.
Still, it was worth it for the good times it had before. Nothing lasts forever.